I had two 60s and quit when BC came out and then started back and got up to 70 and finally Ive quit permenantly! Its just too much of a timesink since im done with college. Job, GF and other RL things come first for me.
THats why i like TF2 so much, i dont have to dedicate 3+ hours at a time if I dont feel like it or have the time.